SOLUTION: Hi I have a ratio problem I could use some help with. If the ratio of boys to girls was 9 to 3 and there are 108 students total, how many boys are there? Thank you, Dawn

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: Hi I have a ratio problem I could use some help with. If the ratio of boys to girls was 9 to 3 and there are 108 students total, how many boys are there? Thank you, Dawn      Log On


   

Question 131329: Hi
I have a ratio problem I could use some help with.
If the ratio of boys to girls was 9 to 3 and there are 108 students total, how many boys are there?
Thank you,
Dawn
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
9:3 give sa total of 9+3=12
108/12=9 now we multiply each factor by 9 @ get
9*9=81 for the number of boys.
3*9=27 for the number of girls.
proof:
total=81+27=108
9:3=81/27
9*27=3*81 cross multiply.
243=243